When an allergen enters the body of an individual that is predisposed to allergies, it triggers an immune reaction and the production of antibodies. These allergen antibodies migrate to mast …

Oct 15, 2025 · Key Takeaways Allergens are substances that cause the body to produce an allergic reaction. Common allergy symptoms include a runny nose, congestion, cough, and …

Jan 1, 2025 · As a result, the immune system reacts by making a type of antibody called immunoglobulin E (IgE) to defend against the allergen. This reaction leads to allergy symptoms.

Allergens may be naturally occurring or of synthetic origin and include pollen, mold spores, dust, lint, animal dander, insect debris, foods, blood serum, and drugs.

Aug 24, 2024 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee venom …

Apr 1, 2025 · Allergies are your immune system’s overreaction to foreign substances. When you touch, inhale or eat something you’re allergic to, your body thinks it’s harmful and reacts to try …

Jul 7, 2025 · Skin prick test: Small amounts of an allergen are pricked, brushed, or scratched against your skin to see if there’s an allergic reaction.

An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction. For instance, if you have an allergy to …

Jun 5, 2025 · How a person reacts to an allergen depends on how they come in contact with it. In many people, allergic reactions occur on the skin and in the airways and mucous membranes.

Allergen immunotherapy, also known as allergy shots, helps build your tolerance to allergens, reducing or eliminating symptoms. It works by the patient being given a gradually increasing …